You cannot change your e-mail address yourself. In order to change it, please contact our Customer Support. Our Customer Support agents must be sure that the request was made by you. To ensure this, a number of account-related questions will be asked, which can only be answered by you.
When the questions are answered satisfactorily, Customer Support will send an e-mail to the new e-mail address to confirm the call/live chat. Please reply to this e-mail, and the e-mail address will then be updated in the player account by us.